1.3.6 Bug with Invert, Mix and Render Tracks

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khead
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1.3.6 Bug with Invert, Mix and Render Tracks

Post by khead » Tue Feb 03, 2009 11:17 pm

This is the main use I've had for Audacity over the years, to examine differences between files.
Just tried with the latest version, and importing the exact same file twice will produce noise when you invert one and mix and render with the other.

khead
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Re: 1.3.6 Bug with Invert, Mix and Render Tracks

Post by khead » Wed Feb 04, 2009 5:32 am

OK - Problem come from using Apple Lossless files. Wav works fine.

bsdwarez
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Re: 1.3.6 Bug with Invert, Mix and Render Tracks

Post by bsdwarez » Sun Apr 12, 2009 2:17 am

khead, thanks for reply. I have some problems with Apple Lossless files too.

jan.kolar
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Re: 1.3.6 Bug with Invert, Mix and Render Tracks

Post by jan.kolar » Sat May 02, 2009 9:38 am

Audacity includes artificial noise at some occasions. This is callend DITHERing and its purpose is to reduce distortion caused by mathematical rounding.
You can
- ensure your Audacity track bit depth (Sample Format) is at least as in your input files.
(do not have 16bit tracks in Audacity)
- switch off dithering in Preferences

I guess your Apple Lossless file differes from your wav file by having higher bit depth (e.g. 32 versus 16 bit)

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